Flyers can be an inexpensive and highly effective way to advertise. They are especially useful for announcing your grand opening, for periodic reminders of the services you offer and for advertising special sales.
A good printer can advise you on the quality of paper to use, overall appearance, size, cost and similar factors, but you should not depend on your printer to help with the sales message or the advertising copy.
Since you might use flyers partly because they are inexpensive, you need to make sure that they are distributed efficiently. Select reliable distributors and pay adequately for their work. Distributors who guarantee effective circulation operate in many cities. Look under Advertising